简介概要

铝合金热冲压成形质量影响因素

来源期刊:中南大学学报(自然科学版)2013年第3期

论文作者:傅垒 王宝雨 孟庆磊 周靖 林建国

文章页码:936 - 941

关键词:铝合金;成形质量;有限元模拟;热冲压

Key words:aluminum alloy; forming quality; finite element simulation; hot stamping

摘    要:建立铝合金热冲压成形的有限元模型,研究坯料初始温度、冲压速度、压边力及摩擦因数对板料成形质量的影响,通过铝合金热冲压实验验证有限元模拟的可靠性。研究结果表明:400~500 ℃是可行的坯料成形初始温度范围;冲压速度增大,成形质量较差,超过一定限度时,冲压速度的增大对板料成形质量影响较小;压边力超过15 kN时,铝合金板料可能产生破裂失效;良好的润滑是铝合金热冲压成形的必要条件,摩擦因数小于0.15时,板料不会被拉裂。

Abstract: A finite element model was established for hot stamping of aluminum alloy, and the factors affecting quality were investigated including initial blank temperature, stamping velocity, blank holder force (BHF) and friction coefficient. The reliability of finite element simulation was proved by the hot stamping experiments of aluminum alloy. The results indicate that initial blank temperature of 400-500 ℃ is feasible in hot stamping. The quality will be weakened with the increase of stamping velocity, however, the effects are limited when certain extents are exceeded. Fracture occurs when BHF is more than 15 kN. Good lubrication is necessary for hot stamping of aluminum alloy. Forming will be successful while friction coefficient is less than 0.15.



详情信息展示

铝合金热冲压成形质量影响因素

傅垒1,王宝雨1,孟庆磊2,周靖1,林建国1, 3

(1. 北京科技大学 机械工程学院,北京,100083;
2. 北京航空制造工程研究所 金属成形技术研究中心,北京,100024;
3. 帝国理工学院 机械工程系,伦敦,SW72AZ)

摘 要:建立铝合金热冲压成形的有限元模型,研究坯料初始温度、冲压速度、压边力及摩擦因数对板料成形质量的影响,通过铝合金热冲压实验验证有限元模拟的可靠性。研究结果表明:400~500 ℃是可行的坯料成形初始温度范围;冲压速度增大,成形质量较差,超过一定限度时,冲压速度的增大对板料成形质量影响较小;压边力超过15 kN时,铝合金板料可能产生破裂失效;良好的润滑是铝合金热冲压成形的必要条件,摩擦因数小于0.15时,板料不会被拉裂。

关键词:铝合金;成形质量;有限元模拟;热冲压

Factors affecting quality in hot stamping of aluminum alloy

FU Lei1, WANG Baoyu1, MENG Qinglei2, ZHOU Jing1, LIN Jianguo1, 3

(1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Research Center of Metal Forming Technology, Aeronautical Manufacturing Technology)

Abstract:A finite element model was established for hot stamping of aluminum alloy, and the factors affecting quality were investigated including initial blank temperature, stamping velocity, blank holder force (BHF) and friction coefficient. The reliability of finite element simulation was proved by the hot stamping experiments of aluminum alloy. The results indicate that initial blank temperature of 400-500 ℃ is feasible in hot stamping. The quality will be weakened with the increase of stamping velocity, however, the effects are limited when certain extents are exceeded. Fracture occurs when BHF is more than 15 kN. Good lubrication is necessary for hot stamping of aluminum alloy. Forming will be successful while friction coefficient is less than 0.15.

Key words:aluminum alloy; forming quality; finite element simulation; hot stamping

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